Eroare de compilare: main.cpp: In function 'void rezolva_linia(int, int)': main.cpp:30:26: error: call of overloaded 'abs(double&)' is ambiguous if(abs(coef[i][j]) >= epsi) ^ In file included from /usr/include/c++/6/cstdlib:75:0, from /usr/include/c++/6/bits/stl_algo.h:59, from /usr/include/c++/6/algorithm:62, from main.cpp:2: /usr/include/stdlib.h:774:12: note: candidate: int abs(int) extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^~~ In file included from /usr/include/c++/6/bits/stl_algo.h:59:0, from /usr/include/c++/6/algorithm:62, from main.cpp:2: /usr/include/c++/6/cstdlib:180:3: note: candidate: long long int std::abs(long long int) abs(long long __x) { return __builtin_llabs (__x); } ^~~ /usr/include/c++/6/cstdlib:172:3: note: candidate: long int std::abs(long int) abs(long __i) { return __builtin_labs(__i); } ^~~ main.cpp: In function 'int main()': main.cpp:121:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("gauss.in", "r", stdin); ^ main.cpp:122:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("gauss.out", "w", stdout); ^ main.cpp:123:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M);///N linii M+1 intregi ^ main.cpp:126:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf", &coef[i][j]); ^ Non zero exit status: 1